On 07/14/2015 11:53 AM, Christoph Hellwig wrote:
On Tue, Jul 14, 2015 at 10:04:12AM -0600, Jens Axboe wrote:
Based on experimentation with two different vendors, 64MB would be a good
default. Question is how best to set that. At least with the current patch,
untouched, 'discard_max_bytes' will still show the hw max value. If I
default it to 64MB, we'd lose that information until people started bumping
it up in size. Maybe that's not such a big deal, however.
Just expose the max value as another read-only sysfs value?
Sure, just didn't want to clutter it with Yet Another sysfs file. But we
could add 'discard_max_hw_bytes', that would be the obvious choice.
--
Jens Axboe
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